Finding the Fourth Proportional to 1,392.72, 2,076.61 and 1,368.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.72 : 2,076.61 = 1,368.12 : x
2. Step 2: Convert to fraction form
   1,392.72/2,076.61 = 1,368.12/x
3. Step 3: Cross multiply
   1,392.72x = 2,076.61 × 1,368.12
4. Step 4: Simplify right side
   1,392.72x = 2,841,051.67
5. Step 5: Solve for x
   x = 2,841,051.67/1,392.72
6. Step 6: Final answer
   x = 2,039.93